Send an email on MailerSend

MailerSend: Send an email. It runs on your own MailerSend account: connect it once in the Relvo app and Relvo adds its credentials server-side. Relvo charges no usage fee; MailerSend may bill that account under its own plan.

Connect MailerSendAll MailerSend toolsAPI docs

Try Send an email now

Compose the request, copy the prompt, and run it in your agent. It runs on your connected MailerSend account.

Prompt composerMarkdown
MailerSendmailersend__send_an_email
Open Relvo
Try asking

More MailerSend tools

The rest of the MailerSend shelf. Every endpoint runs on the same MailerSend connection.

97 tools
Send an emailmailersend__send_an_emailYou are hereyour accountSend bulk emailsmailersend__send_bulk_emailsMailerSendyour accountGet bulk email statusmailersend__get_bulk_email_statusMailerSendyour accountGet a list of activities for a domainmailersend__get_list_of_activitiesMailerSendyour accountGet single activitymailersend__get_single_activityMailerSendyour accountActivity data by datemailersend__get_activity_data_by_dateMailerSendyour accountOpens by countrymailersend__get_opens_by_countryMailerSendyour accountOpens By User-Agentmailersend__get_opens_by_user_agentMailerSendyour accountOpens by reading environmentmailersend__get_opens_by_reading_environmentMailerSendyour accountGet a list of domainsmailersend__get_list_of_domainsMailerSendyour accountAdd a Domainmailersend__add_a_domainMailerSendyour accountGet a single domainmailersend__get_single_domainMailerSendyour accountDelete a domainmailersend__delete_a_domainMailerSendyour accountGet recipients for a domainmailersend__get_recipients_for_a_domainMailerSendyour accountUpdate domain settingsmailersend__update_domain_settingsMailerSendyour accountGet DNS Recordsmailersend__get_dns_recordsMailerSendyour accountGet verification statusmailersend__get_verification_statusMailerSendyour accountGet a list of sender identitiesmailersend__get_list_of_sender_identitiesMailerSendyour accountAdd a sender identitymailersend__add_a_sender_identityMailerSendyour accountGet a single sender identitymailersend__get_single_sender_identityMailerSendyour accountUpdate a sender identitymailersend__update_a_sender_identityMailerSendyour accountDelete a sender identitymailersend__delete_a_sender_identityMailerSendyour accountGet a single sender identity by Emailmailersend__get_single_sender_identity_by_emailMailerSendyour accountUpdate a sender identity by Emailmailersend__update_a_sender_identity_by_emailMailerSendyour accountDelete a sender identity by Emailmailersend__delete_a_sender_identity_by_emailMailerSendyour accountGet a list of inbound routesmailersend__get_list_of_inbound_routesMailerSendyour accountAdd an inbound routemailersend__add_an_inbound_routeMailerSendyour accountGet a single inbound routemailersend__get_single_inbound_routeMailerSendyour accountUpdate an inbound routemailersend__update_an_inbound_routeMailerSendyour accountDelete an inbound routemailersend__delete_an_inbound_routeMailerSendyour account

Set up Send an email for your agent

Pick the client you use, then pick a route: Automatic is that client's own link, command or prompt, and Manual is the same install done by hand, or the tool opened in the Relvo app. Both end at the same OAuth sign-in, with nothing installed per tool.

Automatic way

Open the plugin page with the details ready.

ChatGPT takes custom MCP servers as plugins. The button opens the right page; copy the name and URL into the form and authorise once.

Open ChatGPT plugins

  1. Add a custom MCP server

    On the plugins page, click + and choose Add custom MCP server.

  2. Fill in the connection

    NameRelvo
    Connectionhttps://app.relvo.si/mcp

  3. Authorise and create

    Pick OAuth, tick the confirmation and click Create as a plugin. Approve Relvo in the browser window ChatGPT opens.

  4. Ask for Send an email

    PROMPT
    Using Relvo, call `mailersend__send_an_email` on my MailerSend connection to send an email. Return MailerSend's response as it comes back.

    The client inspects this operation and runs it on your connected account.

Custom MCP servers are set up in ChatGPT on the web, not in the mobile app. Connect once and every chat can call Relvo.

Manual way

Set it up from ChatGPT's settings.

The same connector, reached through the settings menu instead of the plugin page.

  1. Open Apps & Connectors

    In ChatGPT, open Settings → Apps & Connectors and create a new custom connector.

  2. Name it Relvo

    NameRelvo

  3. Point it at Relvo

    Connectionhttps://app.relvo.si/mcp

  4. Authenticate

    Choose OAuth, continue, and approve Relvo in the browser. ChatGPT saves the connector to your account.

  5. Ask for Send an email

    PROMPT
    Using Relvo, call `mailersend__send_an_email` on my MailerSend connection to send an email. Return MailerSend's response as it comes back.

    The agent checks this operation, runs it on your connection, then relays the provider's response verbatim.

  6. Open mailersend__send_an_email in the app

    URL
    https://app.relvo.si/catalog/mailersend__send_an_email

    Connect MailerSend under Connections in the Relvo app, then inspect this operation's input schema before running it.

This operation runs on your own MailerSend account. Relvo charges no usage fee; MailerSend may bill that account on its own plan.

Automatic way

One link fills in the dialog.

On a desktop browser this opens Claude's Add custom connector form with Relvo's name and MCP URL already in place. Click Add and sign in — there is nothing to type.

Add the Relvo connector

  1. Open the dialog

    Click the button above in the browser where you are signed in to Claude. Customize → Connectors opens with the custom-connector form ready.

  2. Add and authorise

    Click Add, then choose Sign in now under Authentication. Relvo signs you in over OAuth, so no token or API key is pasted into Claude.

  3. Ask for Send an email

    PROMPT
    Using Relvo, call `mailersend__send_an_email` on my MailerSend connection to send an email. Return MailerSend's response as it comes back.

    The client inspects this operation and runs it on your connected account.

Manual way

The same connector, typed by hand.

Use this on a phone, in a locked-down workspace, or whenever you would rather add the connector through Claude's own menu.

  1. Open Connectors

    In Claude, go to Customize → Connectors and choose + Add → Add custom connector.

  2. Name the connector

    NameRelvo

  3. Paste the MCP URL

    Server URLhttps://app.relvo.si/mcp

  4. Sign in

    Click Add, choose Sign in now under Authentication, and approve Relvo in the OAuth window. The Relvo tools appear under the connector.

  5. Ask for Send an email

    PROMPT
    Using Relvo, call `mailersend__send_an_email` on my MailerSend connection to send an email. Return MailerSend's response as it comes back.

    The agent checks this operation, runs it on your connection, then relays the provider's response verbatim.

  6. Open mailersend__send_an_email in the app

    URL
    https://app.relvo.si/catalog/mailersend__send_an_email

    Connect MailerSend under Connections in the Relvo app, then inspect this operation's input schema before running it.

This operation runs on your own MailerSend account. Relvo charges no usage fee; MailerSend may bill that account on its own plan.

Automatic way

One command, then one sign-in.

The CLI registers Relvo with HTTP transport and writes it into your Claude Code config; authentication happens in the browser.

  1. Run the command

    BASH
    claude mcp add --transport http relvo https://app.relvo.si/mcp

  2. Authenticate once

    Open a session and run /mcp. Choose Relvo → Authenticate; Claude Code opens Relvo's OAuth page and stores the token for the project.

  3. Check the list

    BASH
    claude mcp list

    Relvo shows as connected, with every catalog tool behind it.

  4. Ask for Send an email

    PROMPT
    Using Relvo, call `mailersend__send_an_email` on my MailerSend connection to send an email. Return MailerSend's response as it comes back.

    The client inspects this operation and runs it on your connected account.

The command uses local scope by default. Add --scope user to make Relvo available in every project, or --scope project to share it through the repository.

Manual way

Write it into .mcp.json.

Project scope lives in a file, so the whole team gets Relvo without running a command.

  1. Add the server

    JSON · .mcp.json
    {
  "mcpServers": {
    "relvo": {
      "type": "http",
      "url": "https://app.relvo.si/mcp"
    }
  }
}

    Create .mcp.json in the project root and add relvo as an HTTP server.

  2. Reload and sign in

    Start a Claude Code session, run /mcp, choose Relvo → Authenticate, then reload. The tools are available in that project.

  3. Ask for Send an email

    PROMPT
    Using Relvo, call `mailersend__send_an_email` on my MailerSend connection to send an email. Return MailerSend's response as it comes back.

    The agent checks this operation, runs it on your connection, then relays the provider's response verbatim.

  4. Open mailersend__send_an_email in the app

    URL
    https://app.relvo.si/catalog/mailersend__send_an_email

    Connect MailerSend under Connections in the Relvo app, then inspect this operation's input schema before running it.

The same entry works for every project when it is added at user scope instead of project scope. This operation runs on your own MailerSend account. Relvo charges no usage fee; MailerSend may bill that account on its own plan.

Automatic way

Hand the setup to Hermes.

Hermes can edit its own config, so one instruction is enough: it writes Relvo into mcp_servers, reloads, and reports the tools it can now call.

  1. Copy the setup prompt

    PROMPT
    Add Relvo as a remote MCP server named "relvo": url https://app.relvo.si/mcp, auth oauth. Follow https://app.relvo.si/SKILL.md, reload MCP, then list the Relvo tools.

  2. Paste it into a Hermes session

    Hermes adds the remote server to ~/.hermes/config.yaml and reloads its MCP connections.

  3. Approve the sign-in

    Open the OAuth link Hermes prints and approve Relvo once. The token is cached, so later sessions do not ask again.

  4. Ask for Send an email

    PROMPT
    Using Relvo, call `mailersend__send_an_email` on my MailerSend connection to send an email. Return MailerSend's response as it comes back.

    The client inspects this operation and runs it on your connected account.

Manual way

Add it to ~/.hermes/config.yaml.

Two settings and one reload — the same entry Hermes would write itself.

  1. Open the config

    Edit ~/.hermes/config.yaml, the file Hermes reads at start-up.

  2. Add the server

    YAML
    mcp_servers:
  Relvo:
    url: https://app.relvo.si/mcp
    auth: oauth

  3. Reload and sign in

    In a session, run /reload-mcp, then approve the OAuth prompt Hermes shows. Tokens are cached under ~/.hermes/mcp-tokens/.

  4. Ask for Send an email

    PROMPT
    Using Relvo, call `mailersend__send_an_email` on my MailerSend connection to send an email. Return MailerSend's response as it comes back.

    The agent checks this operation, runs it on your connection, then relays the provider's response verbatim.

  5. Open mailersend__send_an_email in the app

    URL
    https://app.relvo.si/catalog/mailersend__send_an_email

    Connect MailerSend under Connections in the Relvo app, then inspect this operation's input schema before running it.

This operation runs on your own MailerSend account. Relvo charges no usage fee; MailerSend may bill that account on its own plan.

Automatic way

Hand the install to Cursor.

The button opens Cursor's MCP install dialog with the server name and URL already attached.

Add Relvo to Cursor

  1. Open the install prompt

    Click the button on the machine where Cursor is installed. Cursor receives a server named relvo pointing at https://app.relvo.si/mcp.

  2. Install and authenticate

    Confirm the install, then click Authenticate. Cursor completes Relvo's OAuth in the browser.

  3. Ask for Send an email

    PROMPT
    Using Relvo, call `mailersend__send_an_email` on my MailerSend connection to send an email. Return MailerSend's response as it comes back.

    The client inspects this operation and runs it on your connected account.

The install link opens Cursor directly, so it does nothing in a browser that has never installed the editor.

Manual way

Edit ~/.cursor/mcp.json.

Use the global or the project file when you want the entry under your own control.

  1. Open the MCP config

    Edit ~/.cursor/mcp.json for every project, or .cursor/mcp.json inside the repository for one.

  2. Add Relvo

    JSON
    {
  "mcpServers": {
    "relvo": {
      "url": "https://app.relvo.si/mcp"
    }
  }
}

  3. Reload Cursor

    Save the file and reload the window. Relvo appears in the MCP panel, and Authenticate finishes the sign-in.

  4. Ask for Send an email

    PROMPT
    Using Relvo, call `mailersend__send_an_email` on my MailerSend connection to send an email. Return MailerSend's response as it comes back.

    The agent checks this operation, runs it on your connection, then relays the provider's response verbatim.

  5. Open mailersend__send_an_email in the app

    URL
    https://app.relvo.si/catalog/mailersend__send_an_email

    Connect MailerSend under Connections in the Relvo app, then inspect this operation's input schema before running it.

This operation runs on your own MailerSend account. Relvo charges no usage fee; MailerSend may bill that account on its own plan.

Automatic way

Ask the Bot to wire it up.

Grok Bot configures connections from the conversation, so the quickest route is a single instruction with Relvo's address.

  1. Copy the setup prompt

    PROMPT
    Add a custom MCP server called relvo at https://app.relvo.si/mcp with OAuth sign-in, then list the Relvo tools.

  2. Paste it into a Bot chat

    The Bot repeats the server name and URL and asks you to confirm. Check them and select Add it.

  3. Authorise

    Select Authorize on the card the Bot sends and approve Relvo in the browser once. The Bot can then call the catalog from any chat.

  4. Ask for Send an email

    PROMPT
    Using Relvo, call `mailersend__send_an_email` on my MailerSend connection to send an email. Return MailerSend's response as it comes back.

    The client inspects this operation and runs it on your connected account.

Manual way

Name the server yourself in the chat.

Grok Bot's settings have no field for a server URL; custom MCP servers are added from the conversation.

  1. Describe the server

    NameRelvo
    Server URLhttps://app.relvo.si/mcp

    Ask the Bot to add a custom server with this name and URL. Say custom server, or it may offer a catalog plugin instead.

  2. Confirm

    The Bot repeats the name and URL. Check that the URL is https://app.relvo.si/mcp, then select Add it.

  3. Authorise

    Select Authorize on the card the Bot sends, sign in and allow access. The Relvo tools appear once you are signed in.

  4. Ask for Send an email

    PROMPT
    Using Relvo, call `mailersend__send_an_email` on my MailerSend connection to send an email. Return MailerSend's response as it comes back.

    The agent checks this operation, runs it on your connection, then relays the provider's response verbatim.

  5. Open mailersend__send_an_email in the app

    URL
    https://app.relvo.si/catalog/mailersend__send_an_email

    Connect MailerSend under Connections in the Relvo app, then inspect this operation's input schema before running it.

This operation runs on your own MailerSend account. Relvo charges no usage fee; MailerSend may bill that account on its own plan.

Use MailerSend with any agent

Pick the client you already use. Every one reaches the same catalog through one Relvo key.

All agents
ChatGPTUse MailerSend with ChatGPTClaudeUse MailerSend with ClaudeClaude CodeUse MailerSend with Claude CodeHermes AgentUse MailerSend with Hermes AgentCursorUse MailerSend with CursorGrok BotUse MailerSend with Grok BotCodexUse MailerSend with CodexOpenClawUse MailerSend with OpenClawAny MCP ClientUse MailerSend with Any MCP Client

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Frequently asked questions

Short answers about the key, the price and the call itself.

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